GB 21257-2024 Chinese PDF GB/T 45588-2025 English versions: GB/T 30237-2025

English versions: GB/T 30237-2025

GB/T 45450-2025_Chinese: Revert materials for superalloy - Terminology and classification (Chinese: 再生高温合金原料 术语和分类)

GB/T 45096-2024_Chinese: Evaluation indicators for urban green freight distribution (Chinese: 城市绿色货运配送评价指标)

GB/T 44871-2024_Chinese: Textiles - Determination of the diisocyanate compounds (Chinese: 纺织品 二异氰酸酯类化合物的测定)

GB/T 45344-2025_Chinese: General technical requirements for fabricated and prefabricated gas piping used in buildings (Chinese: 建筑用装配式预制燃气管道通用技术条件)

GB 21257-2024 Chinese PDF GB/T 45588-2025 English versions: GB/T 30237-2025GB 21257 2024_Chinese: Norm of energy consumption per unit production of caustic soda, PVC, methane chloride (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB 21257 2024